It's an early version (V0.2), not the full release; so there's not all the maps, but it's still enjoyable with the first 4 RPG maps: Shal, Tuscari Wasteland, IronHeart Foothills and The Fireforge, plus there's also the LightKeep City for selling and buying stuff.
Check all the merchants in LightKeep! There's good stuff to buy and it will increase with updates!

This time there's also a file with detailed description for the skills and gems you can obtain! I leave it right here so you can read it anytime:

"This is a guide for helping you in the Endgame Content for SP2 Dotp, consider that something can change during updates and fixes.

The main goal in the Endgame Content is obtain as much gold as possible to obtain items and stuffs; this can be done
by playing any maps that you want and pickup items from treasure chests in those maps.
Treasure chest can be anywhere, from the deeper slums, to the highest height of the map.
Bosses had one treasure chest each, but you don't want to miss all of the treasure chest hidden in Shal. Move your Camera or switch to the isometric Camera to find them properly!

Every treasure chest had this chance to get you items:
Liv. 24 Item; 100%
Liv. 28 Item; 20% ---> 100% for treasures guarded by the Last Boss of the map
Liv. 30 Item; 10% ---> This one only for the Last Boss of the map

Maps of the Endgame content it's pretty easy to find; they're those that in the map selection have the tag "(30)(Endgame Content)" near their name.

In those maps the're also Bosses, they're those Monsters that had unique abilities and it require more strategic way to defeat them, and they always guard a treasure chest.
With the items you'll find you can pickup from the vendors at the start of the map Gems, Party members and Relics (this affect both Party Members and Avatar as well)
Marune and SevenStars will sell you new Relics with awesome power (yay they will cost a little, but all the endgame is about gold grinding),
Faction commanders will give you Faction party members, a necklace which you had to buy at maximum 6 times to get all of the members (for each faction).
Also General Einar in LightKeep will sell those Amulets.

You can play along with friends! Actually 4 Player can play together and playing the maps; faction party of each player will be removed if you're using a faction amulet. In this case players will play only with their main Avatar, if you have some companions they will not be removed, but they don't gain any abilities or bonus listed below, so it's your choice to use them or not.

However in LightKeep there's an female amulet vendor that will sell you powerful amulets from the last mission of Dragon Storm! So you can use it when you play with friends!

Gems:
Well, they're marbles actually... XD Everytime you get new Gems you get new powers; here's the list of which Gems are for you:

You'll find the vendors in the cities, every vendor will sell you one type of Gem:

And when you get one Gem, you get always new stats or change of you powers: every 1-3-5-7-9 gems you get new additional stats, every 2-4-6-8-10 gems you get new powers, above 10 actually nothing more occurs. "

And here's a practice list of what skills you get by choosing a certain school of magic or combat style, and the permanent abilities you'll gain by picking up the related gems as well.:

----NB This works for all the 2Hand Weapon Users:
10 (Gray) Gems = When casting Spell MIGHTY BLOW, a Spell EARTHQUAKE is activated around the Avatar, Avatar also became immune to physical attacks
while casting MIGHTY BLOW.

----RIPOSTE
2 Gems = As long as Spell RIPOSTE is active, Avatar stops the Mana of the enemies around him, and also their armor, Avatar also
Drains Health from attackers and gains a +42% to Melee Damage.
4 Gems = When casting Spell RIPOSTE, a major Spell DEGENERATION is activated.

2 IRON WILL
4 Gems = As long as Spell IRON WILL is active, Avatar stops the mana regeneration of the enemies and stun them when they hit him.
6 Gems = When casting Spell IRON WILL, a major Spell SHIELD WALL is activated.

----TOWER SHIELDS (Blue); Provides bonus to damage reduction, also to healing and buffs, must have for a tank
----Skill Tree Bonus
+20% Damage reduction to alll
+100% HateGain

----EVADE
2 Gems = When casting Spell EVADE, a major Spell DANCING LIGHTS, and a major Spell DEGENERATION are activated, also the Avatar can see shadow for a limited time.
4 Gems = When casting Spell EVADE, a minor Spells HEAL is activated.

----FIREBALL
4 Gems = Spell FIREBALL can hit up to 5 enemies at once, and when Avatar cast it, he became immune to fire magic and burn attackers in melee, also gains +100% Regeneration Life on Kill and Hate Loss +25%.

----FREEZE
4 Gems = Spell FREEZE can hit up to 5 enemies at once, and when Avatar cast it, he became immune to ice magic and freeze and deals ice damage attackers in melee, also gains +100% Regeneration Mana on Kill, Hate Loss +25% and stops the ManaRegen of enemies for limited time.

----CORROSIVE CLOUD
2 Gems = When casting Spell CORROSIVE CLOUD, a Spell SHIELD WALL and a major Spell CORROSIVE CLOUD are activated at the Avatar's position, also Avatar gains +75% HateReduction and deals high damage to melee attackers.
7 Gems = When casting Spell CORROSIVE CLOUD Avatar regenerate full of its Mana.

----ROCK PROJECTILE
4 Gems = Spell ROCK PROJECTILE can hit up to 3 enemies at once, and when Avatar cast it, he take only 25% of physical damage and deals high damage to melee attackers, also gains +75% Resitance to Projectiles and Hate Loss +25%.

----EARTHQUAKE
6 Gems = when Avatar cast Spell EARTHQUAKE, he take only 25% of physical damage and deals high damage to melee attackers, also cast a Spell STEADFAST on Avatar.
8 Gems = when Avatar cast Spell EARTHQUAKE, a major Spell EARTHQUAKE is activated at the Avatar's position.

----MENTAL MAGIC-3
----Skill Tree Bonus
ManaRegen +190%
Hypnotize enemies that attacks you
On Avatar death a Spell SILENCE is released
Regenerate 25% of Avatar Mana when any enemy unit gets killed by the Avatar

----DIVINE RETRIBUTION
6 Gems = As long as the effect DIVINE RETRIBUTION is active, Avatar deals direct damage to enemies that attacks him in melee, also Avatar gains +40% ManaRegen and +50% LifeRegen.
8 Gems = When casting Spell DIVINE RETRIBUTION, a Major Spell DIVINE BOLT is activated at the Avatar's position, also Avatar zaps enemies that hits him in melee.
10 Gems = Spell DIVINE RETRIBUTION are extended to allies as well, also allies zap enemies that hit them in melee and they gain +100% ManaRegen and +200% LifeRegen (also the Avatar that launched Spell DIVINE RETRIBUTION).

----GREATER HEALING
2 Gems = Spell GREATER HEALING can heal up to 4 allies, also when casting Spell GREATER HEALING, Avatar became immune to everything, deals damage over time do attackers in melee and channel damage received to enemies around him.

----HOLY LIGHT
4 Gems = When casting Spell HOLY LIGHT, Avatar became immune to everything, deals damage over time do attackers in melee and channel damage received to enemies around him and another minor Spells HOLY LIGHT are activated on the Avatar's position.
7 Gems = When casting Spell HOLY LIGHT, Avatar regenerate full of its mana.
8 Gems = When casting Spell HOLY LIGHT, a Spell GREATER HEALING is activated on allied Avatars.

----GHOST ARMY
7 Gems = A permanent Holy Guardian is summoned for support, the guardian is immortal, has a high Hate Gain and channel received damage to enemies around him.
8 Gems = A permanent Holy Guardian is summoned for support, the guardian is immortal, has a high Hate Gain and channel received damage to enemies around him.
9 Gems = A permanent Holy Guardian is summoned for support, the guardian is immortal, has a high Hate Gain and channel received damage to enemies around him.
10 Gems = A permanent Holy Guardian is summoned for support, the guardian is immortal, has a high Hate Gain and channel received damage to enemies around him.

----DIVINE BOLT
2 Gems = When casting Spell DIVINE BOLT, a minor Spell DIVINE RETRIBUTION is activated on the Avatar, also Avatar gains Immune to Black Magic, deals damage over time to enemies that hits him and regenerate full Mana if kill an enemy with Spell DIVINE BOLT.
4 Gems = Previous Spell DIVINE RETRIBUTION is ehnaced.
6 Gems = As long as the DIVINE RETRIBUTION is active, Avatar zap foes that hits him in melee.

----HOLY WRATH
4 Gems = Spell HOLY WRATH can hits up to 4 enemies, also when casting Spell HOLY WRATH, Avatar became immune to Black Magic and deals damage over time do attackers in melee.

----THUNDERSTORM - (Replace DIVINE COMMAND)
6 Gems = Spell THUNDERSTORM now is ehnanced (liv 70) and now it's triggered at the position of other allied avatars.
7 Gems = When casting Spell THUNDERSTORM, Avatar regenerate full of its mana.
8 Gems = Spell THUNDERSTORM now is ehnanced (liv 120), and hits 200 enemies around the caster.

----FIELD OF PAIN
6 Gem = When casting Spell FIELD OF PAIN, another Spell FIELD OF PAIN (Liv.30) is activated at the Avatar's position, also when casting Spell FIELD OF PAIN, Avatar became immune to Black Magic.
7 Gems = When casting Spell FIELD OF PAIN, Avatar regenerate full of its mana.
8 Gem = When casting Spell FIELD OF PAIN, another Spell FIELD OF PAIN (Liv.120) is activated at the Avatar's position.

4 Gems = Avatar gains a permanent RED CLOUD effect and a LifeRegen +300%, and drains out Health from enemies.
8 Gems = A permanent Malar Fire Starter and a Malar Destroyer are summoned for support, the Malars are immortals.

8 Gems (With no points spent on general Mental Magic)= Two permanent Fire Drakes are summoned for support, the Fire Drakes are immortals.
8 Gems (With 3 points spent on general Mental Magic)= Two permanent Crystal Drakes are summoned for support, the Crystal Drakes are immortals."

Rember that the Skill Tree Bonus is permanent bonus that you gain when obtain 3rd (Golden) rank of it in the Skill Tree; and the Gems Bonus is always active as long as you keep the Gems in your inventory.

I will post here, if it's right, the updates for the maps or the scripts I'll made.

For having these updates you must simply check the date in the post title and re-download from the first post which has the download link for the archive, and re-install it by simply merge the Addon3 Folder of the Endgame Content with the one you already have in your SP2 Dotp Directory, the only things that will be overwritten will be the Endgame Content.

I write here, for saying a big Thank You for all the SP Community. I use a lot of the stuff from the Community and so Thanks to you all, the Endgame Content are born, and it will be update until it will be finished.

Now the Updates:

BOSSES:
Fixed some fighting issue, now when you pick up the Gold Star Relic, Boss gains Smashing Ability as well a boost for their Health, they don't have anymore a permanent Spell RAGE buff.
They're still pretty tough; they hadve more health than simple monsters and their Health are boosted when you pick up the Gold Star Relic. A party is recommended when you're playing in single.

LIGHTKEEP:
An update for the map LightKeep was necessary, now vendors sell more useful items (lv. 24) for your Avatars, I remember you that for lv.30 items you had to take down the 5th Boss on each map
Map is changed a bit.
Also the Amulet vendor (Merchant Ylva) is on the midtown (which is between the main fortress and the port) and she will sells you the various version of the Star of the Highmark.

The items that vendors sells in the cities will be regrouped by category, example: Human have Crossbowman RTS unit, so in Lightkeep there will be a Crossbows vendor but not a Recurve Bow vendor because Human don't have them (it sounds strange I know ).

Also the Mage Stuff now includes all of the Magic Staves from the Marune's Arena, this is a rarely exception, because Arena items and Arena Set Items are so much powerfull that will literally blow in pieces the gameplay.
But it's true that it's difficultfor the common staves for mages to find a true purpose in fight...
Just to telling that no Arena Items will be sold by the vendors, except for the mage staves, instead the weapons from the vendors are still useful, and they're a wide variety, so it will be difficult to see 10 Avatars with the same weapons and armor/robe.

I do as you suggest NeoX now the Endgame content is online on ModDB, it takes a little bit of time to do because I never do that before. As you said I'll post the update there so everyone can check the changes and check just one file.
You made a great work with The SpellForce 2 Master of War Cardgame, it's very nice to play with!